Rihanna tends to live in luxury wherever she goes -- and her week in Arizona preparing for the Super Bowl was no different, 'cause she spared no expense for her desert hideout.
Sources with direct knowledge tell TMZ ... RiRi was renting a home about 30 miles from the stadium where SB LVII went down ... in the town of Paradise Valley -- and, we gotta say, it's a fitting name when ya see this place!!!
The price tag is a real eye-popper -- we're told she spent $85,000/night to stay here, and booked it for 6 nights ahead of the game .